Novel Synthesis of Some New Pyridazine and Pyridazino[4,5-<i>d</i>]pyridazine Derivatives
作者:Fathy M. Abdelrazek、Ahmed A. Fadda、Akram N. Elsayed
DOI:10.1080/00397911003797809
日期:2011.3.28
Abstract Phenacyl-malononitrile derivatives 1a and b react with dimethylformamide dimethylacetal (DMFDMA) in refluxing toluene to afford the enaminones 2a and b respectively. Compounds 2a and 2b react with the hydrazine hydrate 3a and phenyl hydrazine 3b in refluxing ethanol to afford the pyridazinederivatives 5a–d, presumably via the intermediates 4. Compounds 5a–d, react with hydrazine hydrate 3a